Nortel i2021 Series User Manual

Nortel i2021 Series User Manual Manual pdf 11 page image

i2021 ISDN Teleset5Fig. 2: Line and Power JacksLine and Power Connections – i2021 TelesetThe i2021 Teleset must be connected to the line through an NT1 device.This device presents the 2-wire U interface to the line, and the 4-wire S/Tinterface to the Teleset. The Teleset is powered over the phone line. Thismethod conforms to a standard using one of two different poweringmethods: PS1or PS2. Powering method PS2 is preferred. Check withyour equipment provider or system administrator for guidance in settingthe PS1/PS2 switch. Your equipment provider should also be asked aboutusing or disabling the Teleset terminating resistors (TR).SWITCH SETTINGS:n POWER SWITCHThe PS1/PS2 power switch is located on the bottom of the i2021.n TR SWITCHWhen the i2021 Teleset is connected to the NT1 it acts as TerminalEquipment (TE). Terminal Equipment is any (ISDN) device thatterminates directly on the ISDN line without a Terminal Adaptor.If your Teleset is the last, or only, piece of TE on the ISDN line, set the TRto ON, otherwise it is set to OFF. This is determined by the localequipment provider’s policy. It is suggested that you check with the ISDNprovider or your system administrator. Most companies allow up to eightTE units in the loop.